My family loves factsfirst. The program was very engaging. Our growing interest in math has been increased since using factsfirst. It's been fun for our whole family; even Mommy! If I could make one suggestion to the company, it would be to add a preschool/kindergarten section. Middleman (just turned five) enjoys watching the lessons and playing the games, but gets a bit frustrated when he cannot give correct answers every time!
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factsfirst offers a free demo on their website. I would recommend checking it out! For a one year household license, which covers four children, you'll pay $49.99.